TerryP
If your going to that extent have you considered swapping in a trailblazer 4200? They make 275 or 290HP year dependent from the factory. It takes a lot of modifications to get a 292 to that power level and still be driveable. Low mileage 4200's can be had off ebay for under $500. It'll get much better mileage than a modified 292.
I started out with a modified 292 in my '51 GMC (header, cam, intake holley 4bbl, ported head lump ports etc) it got 14 MPG highway with an overdrive auto. Swapped in a stock 275HP 4200, lost a little bit of bottom end torque to the 292(being honest here) but pick 9 MPG on the highway (same trans) and it was so smooth a little throttle and it just went.
Take a trailblazer for a test drive and what its like. The trailblazer is about 4300# model dependent.
Then the mod's started....
Last edited by efi-diy; 08/09/09 03:56 PM.
